There are over a hundred thousand fans packed into the San Diego Convention Center, but is there a Doctor in the house? There is indeed and he's on DC All Access! In this exclusive SDCC clip, we look at the recently announced new LEGO Dimensions Doctor Who expansion and hear from actor Peter Capaldi, who voices the Doctor. We keep the LEGO awesomeness coming with a look at some impressive DC Comics LEGO sculptures from artist Nathan Sawaya and discuss his upcoming "Art of the Brick: DC Comics" exhibition.

In this exclusive bonus clip from "DC All Access," MAD Executive Editor John Ficarra discusses assembling the yearly "20 Dumbest" issue, and what it takes to make the cut. (Here's a hint. It REALLY isn't rocket science.)

Visit DCComics.com or subscribe to DC Comics on Youtube to catch new episodes of "DC All Access" every Tuesday. If you haven't seen this week's episode, you can check it out here: